Moldefts flask-clamp



UNITED STATES PATENT OFFICE.

ALEXANDER G. ALLBEE, OF XVAKEFIELD, ASSIGNOR OF ONE-HALF TO \VM. F.

SAVAGE, OF LYNN, MASSACHUSETTS.

MOLDERS FLASK-CLAM P.

SPECIFICATION forming part of Letters Patent No. 450,820, dated April21, 1891.

Application filed July 10, 1890. Serial No. 358,282. (No model.)

To all whom it may concern:

Be itknown that I, ALEXANDER O. ALLBEE, of WVakefield, in the county ofMiddlesex and State of Massachusetts, have invented certain new anduseful Improvements in Molders Flask-Clamps, of which the following is aspecification.

This invention has for its object to provide a simple and effectiveadjustable clamp for use in foundries to secure together the separableparts or sections of the flasks in which castings are made; and itconsists in a clamp of the improved construction, which I will nowproceed to describe.

Of the accompanying drawings, forming a part of this specification,Figure l represents a side elevation of myimproved clamp. Fig. 2represents a section on line 2 2, Fig. 1. Fig. 3 represents a section online 3 3, Fig. 1, and Fig. at represents a similar section showing oneof the parts in a different position.

The same letters or numerals of reference indicate the same parts in allthe figures.

My improved clamp is composed of two parts or sections Ct 17, formed, aspresently described, to interlock with each other, and

provided at their outer ends with lugs 4 t,

which, when the clamp is adjusted for use, bear on the top and bottom ofthe flask c, a portion of the latter being shown in dotted lines in Fig.1.

The section a is a cylindrical iron rod, on the periphery of which areformed several pyramidal or conical projections 5, arranged in a row, asshown in Fig. 1. The section b is longitudinally grooved to receive thesection a, and has a bridge or cross-bar (3, which extends across thesection a and has a tapering slot 7, formed to receive one of theprojections 5 on the section a. The sides of the slot 7 are beveled tofit the inclined sides of the projection 5, as shown in Fig. 2, and areformed so that the slot gradually decreases in width from one end to theother, as shown in Fig. 1.

The section a is adapted to beturned in the section b, so that theprojection 5 may be withdrawn from the slot 7, as shown in Fig. 4, orinserted in said slot, as shown in Fig. 3, the change from each of saidpositions to the other being effected by partly rotating the section a.

When the section a is in the posltion shown in Fig. 4, it is free tomove endwise in the section b, and thus lengthen or shorten the clamp.Vhen the desired adjustment of the clamp has been effected, the sectiona is turned to the position shown in Fig. 3, and one of its projections5 is thus caused to enter the slot 7. The projection and slot arerelatively formed so that when the projection is turned to the positionshown in Figs. 1, 2, and 3 its sides bind tightly on the tapering andbeveled sides of the slot 7, and thus establish a firm frictionalconnection between the two sections, the projection being wedged intothe slot so firmly that there is no liability of the accidental turningof one sec tion on the other.

It will be seen that the plurality of projections 5 enables the clamp tobe adjusted to various lengths, it being necessary only to move thesection a while it is turned, as shown in Fig. l, until the desiredadjustment is effected, and then look the section a by turning theprojection, which is in position to engage the slot 7, into said slot.

The lugs 4 are preferably inclined at their inner sides, as shown inFig. 1, their inclination enabling them to bear firmly on the sides ofthe flask and press the sections thereof together, as will be readilyseen.

The described clamp is simple and durable. Each of its parts is adaptedto be cast in one piece, and said parts are not liable to beaccidentally separated and misplaced.

I claim 1. The improved flask-clamp composed of the sections a- I), onehaving a series of projections 5 and the other a cross-bar having atapering slot 7, adapted to receive either of said projections, as setforth.

2. The combination of the cylindrical section 0!, having a lug a and aseries of projections 5, and the grooved section I), having a lug 4 anda cross-bar (5, the latter being provided with a tapered slot 7, adaptedto receive either of the projections 5, as set forth.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, this 5th day of July, A. D. 1890.

ALEXANDER C. ALLBEE.

"Witnesses.-

CHAS. F. DAVENPORT, J OSEPH G. SAVAGE.

